摘要:

The recent developments in the study of Bose-Einstein condensation of neutral atoms are described. These studies aim to observe this phenomenon in a Bose gas where the quantum statistics of the particles, rather than the interactions between them, dominate the transition. The latest techniques use a combination of laser and evaporative cooling to get to the very low temperatures, in the nanokelvin regime, that are required to see condensation. In recent experiments at the Joint Institute for Laboratory Astrophysics of the University Colorado and the National Institute of Standards and Technology, Bose-condensed assemblies of rubidium atoms have been produced and their properties investigated. The relationship of this work to other phenomena in condensed matter and quantum field theory is discussed.

ISSN:0010-7514    

DOI:10.1080/00107519608228782

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

Medical imaging has, in the past 25 years, been revolutionized by the introduction and subsequent widespread clinical use of X-ray computerized tomography (CT). CT led the way for the introduction of several new tomographic methods that use physical techniques as diverse as positron annihilation and nuclear magnetic resonance to obtain high spatial resolution reconstructed images of both human anatomy and, more recently, human biological function. The central theme running throughout this revolution is the tomographic principle. This article describes the key elements in present-day medical imaging using tomography as the unifying concept. X-ray CT, positron emission tomography (PET) and magnetic resonance imaging (MRI) are described as far as possible in non-mathematical terms. Most space is devoted to MRI, the newest of the methods and the one which probably holds most promise for the future in terms of its range of application.

ISSN:0010-7514    

DOI:10.1080/00107519608228783

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

The review is devoted to the study of the main electromagnetic properties of the neutron: measurement of the magnetic moment μn, investigations over many years of the electric charge structure, the search for the neutron electric charge qn, the electric dipole moment Dnand the electric polarizability of the neutron.

ISSN:0010-7514    

DOI:10.1080/00107519608228784

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

The BBC Science Unit will be reviewing the development of physics in the 20th century, decade by decade in an annual series leading up to the millenium. Frank Close is presenting these programmes which are built around interviews with leading scientists and historians of science. Essay summaries will appear in Contemporary Physics.

ISSN:0010-7514    

DOI:10.1080/00107519608228785

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

A Survey of ThermodynamicsBy M. BAILYN 1994, £860.00 (hbk), pp. xiv + 657. Oxford University Press, ISBN 0 88318 797 3. Scope: textbook. Level: undergraduate.

ISSN:0010-7514    

DOI:10.1080/00107519608228786

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

ISSN:0010-7514    

DOI:10.1080/00107519608228787

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor